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Thread: Friendly reminder...nearly all torque values are in foot pounds...

  1. #91
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    Quote Originally Posted by a0cake View Post
    Saw a dude's castle nut back off on Sunday at the range. He said he built the rifle himself and was sure he did everything right. (He didn't stake the castle nut first of all). But the main problem was that he kept saying that he tightened it to 40 inch pounds. A small dose of logic would have indicated that the spec is 40 FOOT POUNDS on the castle nut. Unfortunately, Armalite's manual apparently has a typo and says INCH POUNDS also. I told him it was a typo and to tighten it to 38-40 foot pounds. Nope. He takes it to the gunsmith, who agrees with Armalite. He then re-torqued (if you can call 40 inch pounds torque) the castle nut to 40 inch pounds and smothered it in blue loctite. I immediately stopped caring and went back to shooting.

    Foot pounds!
    xxx

    Nevermind, it's already been covered.
    Last edited by Nmate; 05-07-12 at 17:45.

  2. #92
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    After reading through most of this thread a couple nights ago, I go to install my Magpul ASAP plate that had just arrived & what do I read in the instructions? Torque for the castle nut given in in-lbs, referencing the Army spec. Amazing how one typo made that long ago still persists.

  3. #93
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    Quote Originally Posted by will_be View Post
    After reading through most of this thread a couple nights ago, I go to install my Magpul ASAP plate that had just arrived & what do I read in the instructions? Torque for the castle nut given in in-lbs, referencing the Army spec. Amazing how one typo made that long ago still persists.
    Yeah, I saw that too when I installed mine. I don't have a lot of experience putting ARs together, but I am a mechanic and knew that 3.3 lb-ft definitely wasn't enough torque. I just carefully went from 10 lb-ft, to 20, to 40 and then staked it in two places with a center punch.
    Last edited by Nmate; 05-10-12 at 10:31.

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